胸背部痛を主訴とした肺底動脈大動脈起始症の1例

Anormalous Systemic Arterial Supply to the Basal Segments of the Lung Presented with Chest Back Pain；Report of a Case

はじめに　従来PryceⅠ型肺分画症と呼ばれていたものは，現在では血管分布異常との認識から肺底動脈大動脈起始症と呼ばれている．われわれは肺底動脈大動脈起始症に対して胸腔鏡下左下葉部分切除を施行した1例を経験したので報告する．

A 58-year-old woman visited our hospital due to left chest back pain. Chest computed tomography （CT） showed 19 mm nodule in the left lower lobe with the abnormal artery supply from the descending aorta and it was diagnosed as the anomalous systemic arterial supply to the basal segments of the lung. She had undergone partial resection of the left lower lobe by video-assisted thoracoscopic surgery.

Histopathology showed the inflammatory change with fibrosis and lymphocites in the nodule, and fungus-like bacterial masses with macrophages and neutrophils. At 7 days after the operation, the patient discharged without any problems.

In order to perform less invasive treatment, early surgical intervention should be considered to prevent the spread of inflammation in the thoracic cavity.